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Add new Motorola Tetra (simple) driver for Motorola Solutions TETRA PEI
devices.

D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0cad ProdID=9011 Rev=24.16
S:  Manufacturer=Motorola Solutions Inc.
S:  Product=Motorola Solutions TETRA PEI interface
C:  #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

Note that these devices do not support the CDC SET_CONTROL_LINE_STATE
request (for any interface).
Reported-by: Max Schulze <max.schulze@posteo.de>
Tested-by: Max Schulze <max.schulze@posteo.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>